Advanced Placement (AP), 26.06.2019 08:00 alexandergoetz4857

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.

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Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are mor...